Sony and Microsoft have been competing for players for many years, but the business of both companies extends far beyond consoles. Some technologies from one manufacturer are used in the products of the main competitor.
Xbox discs are produced by third-party companies, and the use of the Blu-ray format requires a license from the owners of the relevant patents. Among them is Sony, which can receive a small portion of the fees for the production of some physical editions for Microsoft consoles. Thus, buying a disc-based Xbox game can theoretically bring a small income to the owner of the PlayStation brand.
Of course, we are not talking about amounts that could significantly affect Sony's financial results. The fee applies only to the disc technology, not to the game sold. However, this is a clear example of how complex the relationships between the largest technology companies can be. On store shelves, Xbox and PlayStation remain competitors, although their businesses unexpectedly intersect.